AASHTO guide specifications for LRFD seismic bridge design by Roy A Imbsen; American Association of State Highway and

By Roy A Imbsen; American Association of State Highway and Transportation Officials. Subcommittee on Bridges and Structures

This e-book covers seismic layout for ordinary bridge varieties and applies to non-critical and non-essential bridges. it truly is licensed as an alternative to the seismic provisions within the AASHTO LRFD Bridge layout Specifications. This differs from the present techniques within the LRFD Specifications within the use of displacement-based layout systems, rather than the normal force-based R-Factor process. It contains special counsel and statement on earthquake-resisting parts and structures, worldwide layout options, call for modeling, ability calculation, and liquefaction results. skill layout systems underpin the advisor standards’ method; comprises prescriptive detailing for plastic hinging areas and layout necessities for skill safeguard of these components that are meant to no longer adventure harm.
Included during this digital version are the 2012 and 2014 meantime Revisions. Following every one bankruptcy the Revisions are pointed out in addition to associated in the course of the whole e-book the place to be had. See the "Interim Revisions" sections for an entire record of adjustments to every part.
Content:
entrance subject
• period in-between Revisions 2012
• Preface
• desk of Contents
Section 1. Introduction
Section 2. Definitions and Notation
Section three. basic Requirements
Section four. research and layout Requirements
Section five. Analytical versions and Procedures
Section 6. origin and Abutment Design
Section 7. Structural metal Components
Section eight. bolstered Concrete Components
References
Appendices

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0-sec (S1) with Seven Percent Probability of Exceedance in 75 yr (Approx. 1000yr Return Period) and Five Percent Critical Damping © 2011 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law. 1-11—Horizontal Peak Ground Acceleration Coefficient for Region 3 (PGA) with Seven Percent Probability of Exceedance in 75 yr (Approx. 1000-yr Return Period) © 2011 by the American Association of State Highway and Transportation Officials.

3. Type 2—Essentially Elastic Substructure with a Ductile Superstructure This category applies only to steel superstructures. The ductility is achieved by constructing ductile elements as part of the cross-frames of a steel slab-on-girder bridge superstructure. The deformation capacity of the crossframes located at each pier permits lateral displacement of the deck relative to the substructure below. This is an emerging technology and has not been widely used as a design strategy for new construction.

The deformation capacity of the crossframes located at each pier permits lateral displacement of the deck relative to the substructure below. This is an emerging technology and has not been widely used as a design strategy for new construction. Type 3—Elastic Superstructure and Substructure with a Fusing Mechanism between the Two This category comprises seismically isolated structures and structures in which energy-dissipation devices are used across articulation joints to provide a mechanism to limit energy buildup and associated displacements during a large earthquake.

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